Back to results
US 2014/0175998 A1Published application
Lamp driving apparatus and illumination equipment using the same
AssigneeBeyond Innovation Technology Co., Ltd.
InventorsZhen-Chun Liu, Chen-Lung Kao
Life of this patent
Estimating the term…
Abstract
A lamp driving apparatus and an illumination equipment using the same are provided. The provided lamp driving apparatus is responsible for driving a lamp. When any one of two terminals of the lamp is opened or the lamp is over-voltage, the provided driving apparatus stops driving the lamp, and thus achieving the purpose of open lamp and over-voltage protection/detection.
Claims20
A lamp driving apparatus, comprising:
- a power switching circuit coupled between a DC input high-voltage and a ground potential, and configured to switch and output the DC input high-voltage and the ground potential in response to two output signals with a phase difference of 180 degrees, so as to generate a square signal;
- an LC resonator coupled to an output of the power switching circuit and configured to receive and convert the square signal, so as to generate a sinusoidal driving signal for driving a lamp;
- a control chip coupled to an input of the power switching circuit and operated under a DC operating voltage, and the control chip being configured to provide the output signals to control operation of the power switching circuit;
- and
- an open lamp and over-voltage detection circuit coupled to the control chip and connected across two terminals of the lamp, and the open lamp and over-voltage detection circuit being configured to:
- detect whether the lamp is opened or over-voltage;
- and send, when any one of the two terminals of the lamp is opened or the lamp is over-voltage, an abnormal signal indicating that any one of the two terminals of the lamp is opened or the lamp is over-voltage, to the control chip,
- wherein the control chip further stops providing the output signals in response to the abnormal signal.
5 more elements
An illumination equipment, comprising:
- a lamp configured to emit light in response to a sinusoidal driving signal;
- and
- a lamp driving apparatus, comprising:
- a power switching circuit coupled between a DC input high-voltage and a ground potential, and configured to switch and output the DC input high-voltage and the ground potential in response to two output signals with a phase difference of 180 degrees, so as to generate a square signal;
- an LC resonator coupled to an output of the power switching circuit and configured to receive and convert the square signal, so as to generate the sinusoidal driving signal for driving the lamp;
- a control chip coupled to an input of the power switching circuit and operated under a DC operating voltage, and the control chip being configured to provide the output signals to control operation of the power switching circuit;
- and
- an open lamp and over-voltage detection circuit coupled to the control chip and connected across two terminals of the lamp, and the open lamp and over-voltage detection circuit being configured to:
- detect whether the lamp is opened or over-voltage;
- and send, when any one of the two terminals of the lamp is opened or the lamp is over-voltage, an abnormal signal indicating that any one of the two terminals of the lamp is opened or the lamp is over-voltage, to the control chip,
- wherein the control chip further stops providing the output signals in response to the abnormal signal.
8 more elements
Dependencies are inferred from the claim text.